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Threaded spacer

Threaded spacers are cylindrical fasteners designed with an internal tap and external thread. They enable plastic parts to be assembled and fastened with high resistance to tearing. What's more, they can be screwed and unscrewed without limit. These parts can also be overmolded.

LGC can help you design your solution (prototyping, measurement and pull-out resistance) and industrialize your project with installation and assembly solutions.

Threaded bushing - cylindrical spacer

The threaded bushing: assembly and fastening in a single piece

Threaded bushes are an essential part of the solid, durable fastening of your plastic parts. Thanks to their cylindrical design with an internal tap and external thread, they offer excellent pull-out resistance.

You can screw and unscrew them at will, making assembly and disassembly much easier.

At LGC, we understand the importance of tailoring solutions to meet your specific needs.

That's why we're with you every step of the way, offering prototyping, measurement and tensile strength services. 

What's more, our expertise enables us to help you industrialize your project by offering efficient installation and assembly solutions.

How are LGC threaded bushings manufactured?

There are two different methods for creating a threaded bushing

From material to threaded bushing

The manufacturing process for threaded bushes begins in a similar way to that for threaded inserts threaded inserts.

The first step is to externally thread the reel of raw material. 

This stage is called rolling, as the bushing is passed between 3 rollers and the rolling system cold-forms the part, compressing it to create the thread. Cold deformation has the advantage of reinforcing the material's elastic resistance.

For example, a threaded bushing tapped into a rolled material will have better pull-out resistance than a rolled material. 

The second step is to cut the tube from the raw material on a suitable machine. The tube is cut to the desired length. 

Chamfers and finishes can be added to the material. 

The part then goes through a grinding stage. 

A roller presses the workpieces against a grinding wheel rotating at high speed. 

Thanks to the abrasion of the grinding wheel, the diameter of the part is modified to achieve tolerances of a few microns (~5-6 μm).

Finally, it's time for tapping! This is the internal thread of the bushing.

To do this, a rotating tap passes inside the part to give it the right thread. 

What are the advantages of a threaded bushing?

  • Reinforcement in soft materials: threaded bushes reinforce fasteners in soft materials, offering increased strength for screw and bolt fasteners. This is particularly useful in assemblies subject to heavy loads.
  • Longer service life: thanks to their ability to create stronger threads, threaded bushes extend the service life of assemblies by minimizing thread wear over time.
  • Reduced risk of thread stripping: these inserts reduce the risk of thread stripping, ensuring stable fastening even in conditions where loads may vary.
  • Ease of repair: in the event of thread damage, threaded bushes offer an efficient repair option, eliminating the need to replace costly components.
  • Application in demanding environments: threaded bushes stand up well to demanding environments, offering a reliable solution even in conditions where other fastening methods might fail.

Would you like to find out more about our sockets?

Visit our dedicated article: All you need to know about LGC sockets

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